<template>
    <el-aside style="height: 100%; width: 100%">
        <el-menu
                default-active="2"
                class="el-menu-vertical-demo"
                @open="handleOpen"
                @close="handleClose"
                background-color="#545c64"
                text-color="#fff"
                active-text-color="#ffd04b"
                style="height: 100%; text-align: left;">
            <el-submenu index="1" style="margin-top: 10px; margin-bottom: 10px">
                <template slot="title">
                    <i class="el-icon-location"></i>
                    <span>导航一</span>
                </template>
                <el-menu-item-group>
                    <template slot="title">分组一</template>
                    <el-menu-item index="1-1">选项1</el-menu-item>
                    <el-menu-item index="1-2">选项2</el-menu-item>
                </el-menu-item-group>
                <el-menu-item-group title="分组2">
                    <el-menu-item index="1-3">选项3</el-menu-item>
                </el-menu-item-group>
                <el-submenu index="1-4">
                    <template slot="title">选项4</template>
                    <el-menu-item index="1-4-1">选项1</el-menu-item>
                </el-submenu>
            </el-submenu>
            <el-menu-item index="2" style="margin-top: 10px; margin-bottom: 10px">
                <i class="el-icon-menu"></i>
                <span slot="title">导航二</span>
            </el-menu-item>
            <el-menu-item index="3" style="margin-top: 10px; margin-bottom: 10px">
                <i class="el-icon-document"></i>
                <span slot="title">导航三</span>
            </el-menu-item>
            <el-menu-item index="4" style="margin-top: 10px; margin-bottom: 10px">
                <i class="el-icon-setting"></i>
                <span slot="title">导航四</span>
            </el-menu-item>
        </el-menu>
    </el-aside>
</template>

<script>
  export default {
      methods: {
          handleOpen(key, keyPath) {
              console.log(key, keyPath);
          },
          handleClose(key, keyPath) {
              console.log(key, keyPath);
          }
      }
  }
</script>

<style scoped lang="less">

</style>